Ruben
Forum Replies Created
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@MarkBroussard I’ve been wondering too about how these companies don’t get in trouble. One possibility is that they have a licensing agreement.
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@otherhalf. If you tested the products, why you cannot get the ingredients list. Also with the product name you can find it in many websites. If you are planning to make and commercialize sunscreens in the US, remember these are consider over the counter drugs and therefore need to be produced accordingly.
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@Belassi I don’t know how often people use sodium benzoate to preserve their products. The problem is that many ingredients, especially botanical extracts, come preserved with Potassium Sorbate/Sodium Benzoate.
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Thank you Robert!
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@Belassi My question is more about the advantage of cooling a lotion fast instead of applying slow cooling. I read quite a bit about using fast cooling in the case of emulsifiers that go through phase inversion to get small droplets and therefore a more stable emulsion. However, I wasn’t aware of the benefit of using this technique for non ethoxylated emulsifiers, which according to what I understand, do not go through phase inversion
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Can anyone offer some some explanation to my previous question about crash cooling?
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@Bobzchemist and @milliachemist Do you guys mind explaining the advantage of using crash cooling? Is this related to PIT and used to get small droplet size? Does it work with non-ethoxylated emulsifiers? Thank you
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@Perry Not all agricultural products are GMOs. Most crops are improved by hybridization, which is the cross of compatible plants of the same variety. This is normally done in the fields under controlled conditions but also it can take place in nature without human intervention. GMOs, on the other hand, are the result of taking genes from one species, or kingdom, and inserting into another species, or kingdom, to develop certain traits, such as resistance to specific diseases or agrochemicals.
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@Bobzchemist - Unless these people can prove their product works, which would be very hard to believe, wouldn’t be deceptive advertisement and violate FTC rules?
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@ Belassi Probably because fluorecin has a small solubility in water
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26% oils will make it greasy, especially if you use heavy oils. Beeswax will make your lotion draggy.
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How big is your oil phase?
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I think you could use good ol’ IPP or IPM. I don’t know about the skin feel, though.
You want to stay away from grapeseed oil because it is very unsaturated and therefore gets rancid quickly. -
You can use Dicaprylyl Carbonate instead of C12-C15 alkyl benzoate. Dicaprylyl Carbonate is also sold as a replacement for Cyclopentasiloxane. It is a nice product, but it costs twice as much as traditional esters.
Dicaprylyl Carbonate is sold as Cetiol CC by BASF and as Lonzest DC by Lonza.
Grapeseed oil can be replaced with apricot or sweet almond oil.
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@ Belassi You are right, low temperatures slow down oxidation but doesn’t stop it completely. The solubility of oxygen in oils increases as the temperature of the oil decreases, so it is a good idea, as was suggested by Bob, to flush the head space with an inert gas. For small volumes, you can get a can of those mixtures used to preserve wine, which is generally a mixture of CO2, nitrogen, and argon gas and used to avoid wine deterioration in opened bottles.
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Yes, but it seems that what it is in the Optiphen plus is not enough to provide emolliency. I will order some caprylyl glycol and boost the concentration in my formula to 1 or 2% and see what happens.
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Optiphen Plus
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Thank you all for the ideas.
About silicones. I tried dimethicone copolyol but it became sticky and draggy. I haven’t tried cyclomethicone yet, but I will.
What do you guys think about adding Olive Oil PEG-7 Esters or caprylyl glycol?@ozgirl Thank your for the reminder of Lubrizol’s formulary. I just checked and found a bunch of gel formulations.
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@bobzchemist I am using propylene glycol because it seems less sticky than glycerine. I didn’t realize the skin feel is not very good. I will try glycerin instead.
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@Belassi It is 940. Sorry for the mistake.
@Milliachemist The gel is definitely transparent. It does have an amber color due to the extracts, though. If I can get the right skin feel and reduce “wateriness,” I could live with a translucent type of gel.
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Something I considered at some point was to use a woodworking router to power a saw tooth dispersing blade. Then I got a homogenizer and forgot about it. Routers come in different powers (up to 2.5 HP), with variable speed controls up to 30,000 rpm, and have collets (basically a fix diameter chuck) of 1/4 ,3/8, or 1/2 inch.
Routers can be expensive; but there are some cheap ones that could serve to prove the concept. I wouldn’t use a long shaft to mount the dispersing blade, though. A collet is designed to hold short bits and I don’t know how it would behave with a long rod. I am afraid that if it is too long it could start vibrating and break the collet.Like with any other equipment, a router would need some type of stand or support to hold it in place.This is just an idea I wanted to share. -
I would say it is from the caprylyl glycol, aka 1,2-octanediol, which is part of the aroma profile of some fruits